CN218827469U - Big cylinder battery case and contain its big cylinder battery - Google Patents
Big cylinder battery case and contain its big cylinder battery Download PDFInfo
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- CN218827469U CN218827469U CN202222621012.9U CN202222621012U CN218827469U CN 218827469 U CN218827469 U CN 218827469U CN 202222621012 U CN202222621012 U CN 202222621012U CN 218827469 U CN218827469 U CN 218827469U
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- cylindrical battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a big cylinder battery case and contain its big cylinder battery, the casing includes integrated into one piece's bottom surface board and lateral wall, the bottom surface board includes holding surface and middle part opening, the middle part opening sets up bottom surface board center and intercommunication inside the casing, the holding surface encircles the middle part opening is connected the lateral wall. Through the disclosed big cylindrical battery casing of this scheme and contain its big cylindrical battery, the design is opened to casing bottom non-, but has one and casing lateral wall integrated into one piece's bottom surface board and seals the casing bottom and be used for supporting structure such as electric core and electric connection piece, explosion-proof valve, and intensity is higher, and the support area is big, and explosion-proof effect is better.
Description
Technical Field
The utility model relates to a battery field, in particular to big cylinder battery case and contain its big cylinder battery.
Background
With the increasing maturity of lithium battery technology, lithium batteries are widely used in various fields as power batteries. The large cylindrical lithium battery in the lithium battery is called one of the important directions of power battery enterprises due to the advantages of high energy density, high safety and low cost.
The large cylindrical lithium battery has the advantages of high safety and the like, and is more and more accepted by the market.
The large cylindrical battery generally comprises a shell, an anode cover plate assembly and a cathode cover plate assembly, wherein the shell provides a closed space for accommodating the electrode assembly and electrolyte, the bottom of the shell of the conventional large cylindrical battery generally adopts an open structure, then a thin-wall steel shell for sealing the end is used as a shell, the bottom of the shell is used as a support of a battery cell, and in the running process of a vehicle, the structural strength of the steel shell is required to be improved under the working condition of vibration or mechanical impact all the year round.
In the prior art, the opening end seal at the bottom of the shell adopts a welding or roller groove process, so that the support area is small, the strength is low, and the bottom explosion-proof effect is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to seal in order to overcome among the prior art casing bottom opening end and adopt welding or roller slot technology, and the support area is little on the left, and intensity is low, and the explosion-proof effect of bottom is poor defect provides a big post battery housing and big post battery.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
the utility model provides a big cylindrical battery casing which characterized in that, the casing includes integrated into one piece's bottom surface board and lateral wall, the bottom surface board includes holding surface and middle part opening, the middle part opening sets up bottom surface board center and intercommunication inside the casing, the holding surface encircles the middle part opening connects the lateral wall.
In this scheme, adopt above-mentioned structure, the design is not opened to casing bottom, but has one and casing lateral wall integrated into one piece's bottom surface board closed casing bottom and be used for supporting structure such as electric core and electric connection piece, explosion-proof valve, and intensity is higher, and the support area is big, and explosion-proof effect is better.
Preferably, the plane of the middle opening is recessed towards the inside of the shell relative to the plane of the supporting surface to form a step portion facing the outside of the shell, the step portion is connected to the supporting surface and used for accommodating an explosion-proof valve, the explosion-proof valve is clamped in the step portion and covers the middle opening, and the bottom of the explosion-proof valve does not exceed the supporting surface.
In this scheme, adopt above-mentioned structure, inside sunken formation step portion in the middle of the bottom surface board for the explosion-proof valve can be installed on step portion, and makes it not outstanding in the bottom surface, avoids its load in daily use, thereby can not influence explosion-proof performance, makes explosion-proof effect more accurate.
Preferably, the step portion includes a first step portion and a second step portion which are arranged in a stepped manner, the first step portion connects the supporting surface and the second step portion, the explosion-proof valve is clamped on the second step portion, and a bottom surface of the explosion-proof valve does not exceed a bottom surface of the first step portion.
In this scheme, adopt above-mentioned structure, step portion further divide into first step portion and second step portion according to the height, and explosion-proof valve is installed and is being located inboard second step portion for form the space between its and the holding surface, further avoid explosion-proof valve load and ensure the unobstructed explosion-proof effect that promotes of explosion-proof valve gas circuit.
Preferably, the plane of the middle opening protrudes towards the inside of the shell relative to the plane of the supporting surface to form a protruding portion facing the inside of the shell, and the shape of the protruding portion is matched with that of the electric connection sheet.
In this scheme, adopt above-mentioned structure, inside protruding position was located the casing, its shape and electric connection piece phase-match had guaranteed that electric core is smooth after the casing bottom of packing into, realized the location.
Preferably, the smallest diameter dimension of the support surface is greater than 20mm.
In this scheme, adopt above-mentioned structure, the guarantee holding surface can possess sufficient joint strength, guarantees the security that the battery used.
Preferably, the thickness of the support surface is greater than the thickness of the side wall.
In this scheme, adopt above-mentioned structure, the holding surface plays the primary function to the support of the inside electric core of battery, and it has higher intensity demand, and reduction in production cost when setting up the thickness of holding surface for being greater than the thickness of lateral wall can promote the bulk strength of casing is more reasonable.
Preferably, the shell further comprises a communicating surface, the middle opening is formed in the communicating surface, one end of the supporting surface is connected with the communicating surface, the other end of the supporting surface is connected with the side wall, and the middle opening is of a circular structure or a special-shaped structure.
In this scheme, adopt above-mentioned structure, through setting up the intercommunication face, the middle part opening sets up on the intercommunication face, can set up the middle part opening into different shapes according to different demands, if dysmorphism structure such as circular, or cross, can match different explosion-proof valves and electric connection piece, satisfies different demands.
A large cylindrical battery is characterized by comprising the large cylindrical battery shell.
In this scheme, adopt above-mentioned structure, the design is not opened to this kind of big cylindrical battery's casing bottom, but has one and casing lateral wall integrated into one piece's bottom panel and seals casing bottom and be used for supporting structure such as electric core and electric connection piece, explosion-proof valve, and intensity is higher, and the support area is big, and explosion-proof effect is better.
Preferably, the large cylindrical battery comprises an electric connecting sheet and a battery cell, and the electric connecting sheet and the battery cell are arranged inside the shell;
the electric connection sheet comprises a boss and a connection part, the boss protrudes towards the battery cell direction and is used for supporting the battery cell, and the connection part is fixedly connected to the support surface.
In this scheme, adopt above-mentioned structure, the electricity connection piece has annular connecting portion, can be corresponding with annular holding surface, and annular connecting portion and annular holding surface pass through welded connection together, and connection area is bigger, and joint strength is higher, and electric conductive property and battery security are better.
Preferably, the plane of the middle opening protrudes towards the inside of the shell relative to the plane of the supporting surface to form a protruding portion facing the inside of the shell, and the boss is nested on the protruding portion.
In this scheme, adopt above-mentioned structure, inside the bulge is located the casing, the boss phase-match of its shape and electric connection piece, boss nestification is on the bulge when the installation, and positioning effect is better to guaranteed that electric core is smooth after the casing bottom of packing into, realize the location.
The utility model discloses an actively advance the effect and lie in: the utility model provides a big cylinder battery case and contain its big cylinder battery, the design is opened to casing bottom non-, but has one and casing lateral wall integrated into one piece's bottom surface board seal casing bottom be used for supporting structures such as electric core and electric connection piece, explosion-proof valve, and intensity is higher, and the support area is big, and explosion-proof effect is better.
Drawings
Fig. 1 is a schematic structural view of a large cylindrical battery according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a large cylindrical battery case according to an embodiment of the present invention.
Fig. 3 is a schematic front structural view of a large cylindrical battery case according to a first embodiment of the present invention.
Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3.
Fig. 5 is an enlarged view of a portion B of fig. 4.
Fig. 6 is a schematic bottom structure diagram of a large cylindrical battery case of the first embodiment of the present invention equipped with an explosion-proof valve.
Fig. 7 is a schematic structural view of an electrical connection sheet according to a first embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a bottom structure of a large cylindrical battery according to a first embodiment of the present invention.
Fig. 9 is a schematic structural view of a large cylindrical battery case according to the second embodiment of the present invention.
Fig. 10 is a schematic structural view of a large cylindrical battery case according to a third embodiment of the present invention.
Fig. 11 is a schematic structural diagram of a large cylindrical battery case according to a fourth embodiment of the present invention.
Description of reference numerals:
battery 1
Supporting surface 111
Middle opening 112
Convex part 115
Explosion-proof valve 200
Boss 310
Connecting part 320
Detailed Description
The present invention will be more clearly and completely described in the following detailed description of the preferred embodiments in conjunction with the accompanying drawings.
Example one
As shown in fig. 1, the present embodiment discloses a large cylindrical battery 1, which comprises a large cylindrical battery case 100, a battery cell 400 disposed in the case 100, an electrical connection sheet 300 connecting the case 100 and the battery cell 400, and an explosion-proof valve 200.
As shown in fig. 2, in the large cylindrical battery case 100 of the present embodiment, the case 100 includes a bottom panel 110 and a sidewall 120 which are integrally formed, the bottom panel 110 includes a support surface 111 and a middle opening 112, the middle opening 112 is disposed at the center of the bottom panel 110 and communicates with the inside of the case 100, and the support surface 111 surrounds the middle opening 112 and communicates with the sidewall 120.
The bottom of the casing 100 is not designed to be open, but the bottom plate 110 integrally formed with the sidewall 120 of the casing 100 is provided to close the bottom of the casing 100 for supporting the battery cell 400, the electrical connection sheet 300, the explosion-proof valve 200 and other structural members, so that the strength is higher, the supporting area 111 is large, and the explosion-proof effect is better.
As shown in fig. 4, a plane of the middle opening 112 is recessed towards the inside of the housing 100 relative to a plane of the supporting surface 111 to form a step portion (in this embodiment, the first step portion 113 and the second step portion 114, in other embodiments, only one step portion may be provided), which is toward the outside of the housing 100, the step portion is connected to the supporting surface 111, the step portion is used for accommodating the explosion-proof valve 200, the explosion-proof valve 200 is clamped in the step portion, the explosion-proof valve 200 covers the middle opening 112, and the bottom of the explosion-proof valve 200 does not exceed the supporting surface 111.
The middle of the bottom panel 110 is recessed inwards to form a step part, so that the explosion-proof valve 200 can be installed on the step part and does not protrude out of the bottom surface, the bearing force of the explosion-proof valve in daily use is avoided, the explosion-proof performance is not influenced, and the explosion-proof effect is more accurate.
As shown in fig. 4-8, the step portion includes a first step portion 113 and a second step portion 114 which are arranged in a stepped manner, the first step portion 113 connects the supporting surface 111 and the second step portion 114, the explosion-proof valve 200 is clamped on the second step portion 114, and the bottom surface of the explosion-proof valve 200 does not exceed the bottom surface of the first step portion 113.
The step part is further divided into first step part 113 and second step part 114 according to the height, and explosion-proof valve 200 is installed and is located inboard second step part 114 for form the space between it and the holding surface 111, further avoid explosion-proof valve 200 load and ensure the unobstructed explosion-proof effect of promotion of explosion-proof valve 200 gas circuit.
As shown in fig. 4-8, the plane of the central opening 112 is convex toward the inside of the casing 100 relative to the plane of the supporting surface 111 to form a convex portion 115 facing the inside of the casing 100, and the shape of the convex portion 115 matches the shape of the electrical connection sheet 300.
The protruding portion 115 is located inside the casing 100, and the shape thereof matches with the electrical connection sheet 300, so that the battery cell 400 is ensured to be smoothly installed at the bottom of the casing 100, and then positioning is achieved.
As shown in fig. 4, the minimum diameter dimension of the bearing surface 111 is greater than 20mm.
The support surface 111 can have sufficient connection strength, and the safety of the use of the battery 1 is ensured.
As shown in fig. 5, the thickness D of the support surface 111 is greater than the thickness C of the sidewall 120.
The supporting surface 111 plays a main role in supporting the battery cell 400 inside the battery 1, and has a higher strength requirement, and the thickness of the supporting surface 111 is set to be larger than the thickness of the sidewall 120, so that the overall strength of the casing 100 can be improved, and the production cost can be reduced, and the structure is more reasonable.
As shown in fig. 7, the large cylindrical battery 1 includes an electrical connection sheet 300 and a battery cell 400, and the electrical connection sheet 300 and the battery cell 400 are disposed inside the casing 100, as shown in the figure. The electrical connection sheet 300 includes a boss 310 and a connection portion 320, the boss 310 protrudes toward the battery cell 400 to support the battery cell 400, and the connection portion 320 is fixedly connected to the support surface 111.
The electrical connection sheet 300 has an annular connection portion 320 capable of corresponding to the annular support surface 111, and the annular connection portion 320 and the annular support surface 111 are connected together by welding, which provides a larger connection area, higher connection strength, better electrical conductivity, and better safety of the battery 1.
As shown in FIG. 8, the plane of the central opening 112 is raised toward the inside of the casing 100 relative to the plane of the supporting surface 111 to form a protrusion 115 facing the inside of the casing 100, and the boss 310 is nested on the protrusion 115.
The protruding portion 115 is located inside the casing 100, the shape of the protruding portion 115 is matched with the boss 310 of the electrical connection sheet 300, and when the boss 310 is installed, the protruding portion 115 is nested on the boss 310, so that the positioning effect is better, and therefore after the battery cell 400 is smoothly installed at the bottom of the casing 100, positioning is achieved.
Example two
As shown in fig. 9, the general structure of the casing 100 of the present embodiment is substantially the same as that of the first embodiment, except that the arrangement form of the central opening is different, the casing 100 of the present embodiment further includes a communication surface 130, the central opening 112 is arranged on the communication surface 130, one end of the supporting surface 111 is connected to the communication surface 130, the other end of the supporting surface 111 is connected to the side wall 120, and the central opening 112 has a circular structure.
Through setting up the connected surface 130, middle part opening 112 sets up on connected surface 130, can set up middle part opening 112 into different shapes according to different demands, can match different explosion-proof valve 200 and electric connection piece 300, satisfies different demands.
EXAMPLE III
As shown in fig. 10, the general structure of the casing 100 of the present embodiment is substantially the same as that of the second embodiment, except that the central opening is shaped like a kidney-shaped hole.
Example four
As shown in fig. 11, the housing 100 of the present embodiment has a general structure substantially the same as that of the second embodiment, except that the central opening has a cross waist shape.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The utility model provides a big cylindrical battery casing, its characterized in that, the casing includes integrated into one piece's bottom surface board and lateral wall, the bottom surface board includes holding surface and middle part opening, the middle part opening sets up bottom surface board center and intercommunication inside the casing, the holding surface encircles the middle part opening connects the lateral wall.
2. The large cylindrical battery shell according to claim 1, wherein the plane of the middle opening is recessed toward the inside of the shell relative to the plane of the support surface to form a step portion facing the outside of the shell, the step portion is connected to the support surface and is used for accommodating an explosion-proof valve, the explosion-proof valve is clamped in the step portion and covers the middle opening, and the bottom of the explosion-proof valve does not exceed the support surface.
3. The big cylindrical battery shell according to claim 2, wherein the step part comprises a first step part and a second step part which are arranged in a stepped manner, the first step part is respectively connected with the support surface and the second step part, the explosion-proof valve is clamped on the second step part, and the bottom surface of the explosion-proof valve does not exceed the bottom surface of the first step part.
4. The big cylindrical battery shell according to claim 1, wherein the plane of the middle opening protrudes towards the inside of the shell relative to the plane of the supporting surface to form a protruding part facing the inside of the shell, and the shape of the protruding part is matched with the shape of the electric connection sheet.
5. The large cylindrical battery housing of claim 1, wherein said support surface minimum diameter dimension is greater than 20mm.
6. The large cylindrical battery housing of claim 1, wherein the thickness of said support surface is greater than the thickness of said side wall.
7. The big cylindrical battery shell according to any one of claims 1 to 6, wherein the shell further comprises a communication surface, the middle opening is formed on the communication surface, one end of the supporting surface is connected with the communication surface, the other end of the supporting surface is connected with the side wall, and the middle opening is of a circular structure or a special-shaped structure.
8. A large cylindrical battery comprising a large cylindrical battery case according to any one of claims 1 to 7.
9. The large cylindrical battery according to claim 8, wherein the large cylindrical battery comprises an electrical connection sheet and a cell, the electrical connection sheet and the cell being disposed inside the case;
the electric connection sheet comprises a boss and a connecting portion, the boss protrudes towards the battery cell direction and is used for supporting the battery cell, and the connecting portion is fixedly connected to the supporting surface.
10. The large cylindrical battery according to claim 9, wherein the plane of the middle opening protrudes toward the inside of the case from the plane of the supporting surface to form a protrusion facing the inside of the case, and the boss is nested on the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222621012.9U CN218827469U (en) | 2022-09-29 | 2022-09-29 | Big cylinder battery case and contain its big cylinder battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222621012.9U CN218827469U (en) | 2022-09-29 | 2022-09-29 | Big cylinder battery case and contain its big cylinder battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218827469U true CN218827469U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222621012.9U Active CN218827469U (en) | 2022-09-29 | 2022-09-29 | Big cylinder battery case and contain its big cylinder battery |
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| CN (1) | CN218827469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117393934A (en) * | 2023-10-24 | 2024-01-12 | 东莞市创明电池技术有限公司 | Cylindrical battery and method for assembling the same |
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2022
- 2022-09-29 CN CN202222621012.9U patent/CN218827469U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117393934A (en) * | 2023-10-24 | 2024-01-12 | 东莞市创明电池技术有限公司 | Cylindrical battery and method for assembling the same |
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